You need to contact brigade in which his unit was in at the time of service. Usually the battalion would have records at S-1.

You are allowed a separation under “honorable conditions” this would not require a general discharge under the circumstances.

Unfortunately, you may not be able to sue. You need to contact your nearest VA regional office.

How do I start the process of getting my bad conduct discharge upgraded from 1982?

You need to go through the Army Board of Military Corrections. They will take 4-6 months to decide whether you deserve an upgrade. Make sure to...

First and foremost you need to seek a medical professional through your chain of command. Don’t be afraid to ask for help through your superiors....